C7 Plug fouling.
Thread Starter
Racer
Joined: Jan 2019
Posts: 391
Likes: 207
From: Halifax Nova Scotia
C7 Plug fouling.
I have a neighbor with an 2018 C7 G/S.
The car is all stock and about 7-8000 miles.
He says the car has fouled spark plugs more than once and the dealer has not found the cause.
Is this a know issue??
The car is all stock and about 7-8000 miles.
He says the car has fouled spark plugs more than once and the dealer has not found the cause.
Is this a know issue??
Last edited by allgonoshow2; Jun 27, 2021 at 05:18 PM.
Melting Slicks
Joined: Aug 2017
Posts: 2,194
Likes: 2,206
From: Massachusetts
Need more info:
Is it always just plugs on left or right bank? (odd or even cylinders)
Is it random cylinders?
Is it always one single cylinder?
Does a scanner show another codes?
I believe your neighbor needs to go to another dealership with better diagnostic tech's. The present dealership is not fixing the cause.
( Gee, your tire is going flat. No problem, we will put air in it
)
He needs to get this taken care now so he is confident it is fixed in the future.
Is it always just plugs on left or right bank? (odd or even cylinders)
Is it random cylinders?
Is it always one single cylinder?
Does a scanner show another codes?
I believe your neighbor needs to go to another dealership with better diagnostic tech's. The present dealership is not fixing the cause.
( Gee, your tire is going flat. No problem, we will put air in it
)He needs to get this taken care now so he is confident it is fixed in the future.
Race Director
Joined: Apr 2017
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From: Virginia
Don't think so as I don't recall any threads here regarding such. As stated above (crucial question), is it always the same cylinder?
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Haven’t seen treads on plug fouling - I too would suggest taking it to a dealer with better diagnostic skills.
Burning Brakes
Joined: Jan 2020
Posts: 808
Likes: 399
From: NW Georgia
I have not seen anything on a problem with plug fouling but my 1993 Dodge Viper and my 2016 Corvette Stingray A8 when they sat for 2 or 3 weeks and were not driven would be skipping when I cranked them up. I would take both cars up the road and drive them aggressively for a mile or two and really blow them out and they would clear up every time. I figured it was moisture in the system from sitting so long, but didn't worry about it because after a few aggressive romps on it, they both always cleared out.
Race Director
Joined: Mar 2001
Posts: 19,964
Likes: 6,768
From: Bonneville Salt Flats
"...spare plugs..." ? You mean "spark," right?
If plugs foul it is for specific reasons, each of which need to be checked. They include faulty spark (for many possible reason, which each would need to be eliminated unless another cause is found first), and contamination, usually from oil. Tell the owner to get the thing to a competent mechanic (not just a semi-random parts-changer/tech) who can do an appropriate diagnosis. Then, go from there based on the findings. All the best to him.
If plugs foul it is for specific reasons, each of which need to be checked. They include faulty spark (for many possible reason, which each would need to be eliminated unless another cause is found first), and contamination, usually from oil. Tell the owner to get the thing to a competent mechanic (not just a semi-random parts-changer/tech) who can do an appropriate diagnosis. Then, go from there based on the findings. All the best to him.
Racer
Joined: Jul 2007
Posts: 401
Likes: 8
From: Jackson TN
I had my 2017 GS in the dealership 3 different times for a fouled plug. The problem was the car sat for extended periods of time. I drove truck for a living and sometimes 4 to 8 months between driving. When I got the car out after sitting a check engine light came and the car ran very badly, it felt like the rear end was coming apart. ( yes the rear end) I was able to nurse it back to the dealer. Each time they said it was a fouled plug because the gas had gotten 'old'. I never put anything in the gas, (probably should have). I have since retired and have not had any issues in over a year and half. The owner of the dealership, a Corvette guy himself ,took the time to get involved on the last time. By that time I was really REALLY pissed. He told me to get the car out more often and drive it 'like it needs to be run'. ...... and I do.
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Thread Starter
Racer
Joined: Jan 2019
Posts: 391
Likes: 207
From: Halifax Nova Scotia
